Apple ignores this and insists, in its Apple-like way, on calling it “USB 4 ... with all Thunderbolt 4 devices supporting USB4. If someone has a USB4 laptop, they can use a TB4 device ...

USB 4 always uses a USB-C connector. There are multiple versions of USB 4 with speeds ranging from 20 Gb/s to 120/40 Gb/s. Thunderbolt 5 includes USB 4 v2 which supports 80/80 Gb/s and 120/40 Gb/s.